Final Study Guide Flashcards
- Describe the anatomical differences between:
Skeletal Muscles
Smooth Muscles
Cardiac Muscles
Describe the anatomical differences between:
- Skeletal muscles- muscle attached to bone through its tendon, under voluntary control
- Smooth muscles- found in hollow structures of the body like the intestines; cannot be influenced at will
- Cardiac muscles- muscle found only in the heart
Which of the 3 muscle types are under voluntary & involuntary (autonomic nervous system) control?
Skeletal: voluntary, striated, multinucleated
Smooth: involuntary, nonstriated and uninucleated
Cardiac: involuntary, striated and uninucleated
Where are cardiac muscles found?
Cardiac muscles are found in the heart
Explain the current concept of muscle contraction based on three factors: neuroelectrical, chemical, and energy sources.
Watch video on this
elevation
raising a part of the body
flexion
bending or decreasing the angle between bone
pronation
moving the bones of the forearm so that the radius and ulna are not parallel
eversion
moving the sole of the foot outward at the ankle
What is muscle tone?
Muscle Tone is defined as a property of muscle in which a steady or constant state of partial contraction is maintained in a muscle.
Compare isotonic and isometric contractions
- Isotonic contraction- contraction in which tone or tension remains the same as the muscle becomes shorter and thicker.
- Isometric activity contraction in which a muscle remains at a constant length while tension against the muscle increases
Describe 3 different inflammatory muscle or joint conditions.
- TENDINITIS-
- PLANTAR FASCIITIS-
- MYOSITIS-
.TENDINITIS-
TENDINITIS- inflammation of a tendon.
PLANTAR FASCIITIS-
PLANTAR FASCIITIS- an inflammation of the connective tissue (fascia) that is part of the arches of the foot.
MYOSITIS-
MYOSITIS- inflammation of muscular tissue.
- Name the 2 major divisions of the nervous system.
- central nervous system
2. periphreal nervous system
the central nervous system
consists of the brain and spinal cord
Identify the two subcategories of the Peripheral Nervous System (PNS) and their components.
- Sensory (afferent)
2. Motor (efferent)
Identify the two subcategories of the Peripheral Nervous System (PNS) and their components.:
sensory components
1
Sensory neuron
a neuron in contact with receptors; it detects changes in the external environment; also called afferent neuron
Internuncial neurons
transmit the sensory impulse to the appropriate part of the brain or spinal cord for interpretation and processing; also known as association neurons
Motor neuron
Motor neuron neuron that connects with muscles or glands to bring about a reaction to a stimulus; also called efferent neuron
Explain how a neuron transmits a nerve impulse.
the all or none principle a nerve cell will either fire or not fire once the impulse begins it will continue down the cell.
impulse conduction in myelinated nerve fibers
myelinated surface prevents ion flow from the insulated membrane
impulse conduction unmyelinated nerve fibers
unmyelinated fiber conducts an impulse over its entire surface
how depressants act on the CNS.
- mellow
- slow body function
- supports neural activity
how stimulants act on the CNS
1 speed up body function
- excite neural activity
- increase self-confidence
- mood changes
how hallucinogens act on the CNS.
- distort perception
2. evoke sensory images
List the main parts of the brain.
- Brainstem
- Diencephalon
- Cerebrum
- Cerebellum
List the protections of the brain
- Cranial bones
- Meninges
- Cerebrospinal fluid
List the VENTRICLES of the brain
- 4 Ventricles
2. Interventricular foramen
dura mater
the outermost spinal or cranial meninx
arachnoid mater,
the middle spinal or cranial meninx
(DAP)
- Dura Mater
- Arachnoid mater
- Pia Mater
List the 12 cranial nerves and their functions
Olfactory nerve l
conveys impulses related to smell
List the 12 cranial nerves and their functions
Optic nerve II
Optic nerve II conveys impulses related to sight
List the 12 cranial nerves and their functions
Oculomotor nerve III
Oculomotor nerve III controls movements of the eyeball and upper eyelid and conveys impulses related to muscle sense
List the 12 cranial nerves and their functions
Trochlear nerve IV
Trochlear nerve IV controls the movement of the eyeball and conveys impulses related to muscle sense
List the 12 cranial nerves and their functions
Trigeminal nerve V
Trigeminal nerve V
largest of the cranial nerves; controls chewing movements
List the 12 cranial nerves and their functions
Abducens nerve VI
Abducens nerve VI
controls movement of the eyeball
List the 12 cranial nerves and their functions
Facial nerve VII
controls the muscles of facial expression and conveys sensations related to taste
List the 12 cranial nerves and their functions
Vestibulocochlear nerve VIII
Vestibulocochlear nerve VIII transmits impulses related to equilibrium and hearing
List the 12 cranial nerves and their functions
Glossopharyngeal nerve IX
controls swallowing and carries taste impulses
List the 12 cranial nerves and their functions
Vagus nerve X
Vagus nerve X controls skeletal muscle movements in the pharynx, larynx, and palate
List the 12 cranial nerves and their functions
Accessory nerve XI
Accessory nerve XI helps control swallowing and movements of the head
List the 12 cranial nerves and their functions
Hypoglossal nerve XII
Hypoglossal nerve XII controls the muscles involved in speech and swallowing; its sensory fibers conduct impulses for muscle sense
- a) List the two subcategories of the Autonomic Nervous System (ANS).
- sensory Neurons
2. Motor neurons
Sensory neurons of the autonomic nervous system
sensory information from visceral organs to central nervous system.
Motor neurons of the autonomic nervous system
motor impulses from central nervous system to smooth muscles cardiac muscles and glands
List the two subcategories of the Somatic nervous system
- sensory neurons
2. motor neurons
sensory neurons of the somatic nervous system
sensory information from skin, skeletal muscles, and joints to central nervous system
Motor neurons of the somatic nervous system
Motor impulses from the central nervous system to skeletal muscles
parts of the eyes
- Sclera (outermost)
- Choroid (2nd layer)
- Ciliary Body & Muscle:
- Iris:
- Inner Fluid Compartments:
- Retina (innermost layer)
parts of the ear
- Outer ear
- Middle ear
- Inner ear
parts of the sense of smell
- Bipolar sensory neurons
- Olfactory bulbs
- olfactory cortex
Rods in the eye
Rods- night vision
Cones in the eye?
Cones- light & color
- Conditions that harm the CNS by through vascular changes.
Cerebrovascular Accident (AKA Stroke)
Cerebrovascular Accident (AKA Stroke)- caused by a 1) clot or thrombus in a blood vessel, 2) hemorrhage in tissue, or 3) vasospasm (constriction of a cerebral blood vessel)
- Conditions that harm the CNS by through vascular changes.
Aneurysm (“Ballooning”)
Aneurysm (“Ballooning”)- an enlargement or dilation of a blood vessel wall.
If it bursts -> Often leads to a Hemorrhage
Describe two examples of Inflammatory Conditions that harm the CNS.
Meningitis
Meningitis- an inflammation of the meninges caused by bacterial or viral infection.
SYMPTOMS: Headache, Fever, and a Stiff neck;
If viral, can ALSO cause Paralysis, Coma, and Death
Describe two examples of Inflammatory Conditions that harm the CNS.
Encephalitis
Encephalitis- an inflammation of brain tissue usually caused by a virus transmitted by the bite of a mosquito.
SYMPTOMS: coma, fever, and convulsions and could result in death
Describe two examples of Conditions that harm the CNS, impairing movement
Parkinson’s Disease
Parkinson’s Disease-caused by damage to basal nuclei, resulting in dopamine deficiency.
SYMPTOMS: Resting hand tremors, Slow, shuffling walk, Rigid muscle movements
Define Homeostasis
maintaining the body’s internal environment
What is the primary type of feedback which regulates the endocrine system?
negative feedback loop
What is the name of the master gland?
Hypothalamus
- Describe a condition that affects the body due to hormone imbalance of:
a) Aldosterone
high blood pressure
- Describe a condition that affects the body due to hormone imbalance of:
b) Melatonin
Seasonal Affective Disorder (SAD)
- Describe a condition that affects the body due to hormone imbalance of:
c) Prolactin
- May cause a decrease in male sex hormones
- Describe a condition that affects the body due to hormone imbalance of:
d) Insulin
Diabetes Mellitus (Pancreas)
- Describe a condition that affects the body due to hormone imbalance of:
e) Thyroid hormones
- HYPERTHYROIDISM
2. HYPOTHYROIDISM
Explain the current concept of muscle contraction based on neuroelectrical factors.
Concentration of electrolytes:
Na+ higher on outside
K+ higher on inside
Resting potential: charge outside positive and inside negative
Action (Electrical) Potential:
rush of Na+ inside cell
AKA “Depolarization”
Repolarization:
K+ moves outside cell attempting to balance change in charges
Depolarization:
Initiated by Calcium’s release
The inhibitory proteins’ (Troponin and tropomyosin) action inhibited
Activated myosin filaments links to actin filaments
“Power Stroke”
Explain the current concept of muscle contraction based on chemical interactions
Depolarization:
Myosin heads contain ATP
ATP releases energy upon myosin/action link
Energy released used to pull action
Repolarization:
“Sodium: potassium” pump pumps sodium outside the cell
Resting potential restored
Explain the current concept of muscle contraction based on energy sources.
ATP: energy source for muscle contraction
ATP production: primarily from glucose via cellular respiration:
Glycolysis
Krebs citric acid cycle
Electron transport
Alternate sources: fatty acids and phosphocreatine
Peripheral nervous system
consists of all the nerves that connect the brain and spinal cord with sensory receptors, muscles, and glands
Describe two examples of Conditions that harm the CNS, impairing movement
Multiple Sclerosis (MS)-
Multiple Sclerosis (MS)- progressive demyelination of nerve cells in the brain and spinal cord. SYMPTOMS: Muscle weakness, Double vision, Vertigo, abnormal reflexes, and occasionally difficulty in urination.
Describe two examples of Conditions that harm the CNS, impairing movement
Cerebral Palsy-
Cerebral Palsy- caused by brain damage during brain development or the birth process.
SYMPTOMS: Muscle spasms & Tremors, poor Body Balance, Awkward movements, Head tossing, & Flailing arms, Impaired speaking & swallowing.
parts of the brain stem
- Midbrain
- Pons
- Medulla
parts of Diencephalon
- Thalamus
2. Hypothalamus
parts of the meninges
- Epidural Space
- Dura Mater
- Subdural Space
- Arachnoid Mater
- Subarachnoid Space
- Pia Mater